package top.ljjapp.soufang.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.web.ErrorAttributes;
import org.springframework.boot.autoconfigure.web.ErrorController;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.context.request.ServletRequestAttributes;
import top.ljjapp.soufang.base.ApiResponse;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Map;

@Controller
public class AppErrorController implements ErrorController {

    private static  final String ERROR_PATH = "/error";

    private ErrorAttributes errorAttributes;

    @Override
    public String getErrorPath() {
        return ERROR_PATH;
    }

    @Autowired
    public AppErrorController(ErrorAttributes errorAttributes){
        this.errorAttributes = errorAttributes;
    }

    /**
     * 处理页面错误
     * @param request
     * @param response
     * @return
     */
    @RequestMapping(value = ERROR_PATH , produces = "text/html")
    public String erroerPageHandler(HttpServletRequest request, HttpServletResponse response){
        int status = response.getStatus();
        switch (status){
            case 403:
                return "403";
            case 404:
                return "404";
            case 500:
                return "500";

        }
        return "index";
    }

    /**
     * 处理除页面其他的异常
     * @param request
     * @return
     */
    @RequestMapping(value = ERROR_PATH)
    @ResponseBody
    public ApiResponse errorApiHandler(HttpServletRequest request){
        ServletRequestAttributes requestAttributes = new ServletRequestAttributes(request);
        Map<String, Object> attr = this.errorAttributes.getErrorAttributes(requestAttributes, false);
        int status = getStatus(request);
        return ApiResponse.ofMessage(status,String.valueOf(attr.getOrDefault("message","error")));
    }

    private int getStatus(HttpServletRequest request){
        Integer status =(Integer) request.getAttribute("java.servlet.error.status_code");
        if (status != null){
            return status;
        }
        return 500;
    }
}
